Calibrating effective Ia supernova magnitudes using the distance duality relation

Evslin, Jarah

doi:10.1016/j.dark.2016.09.005

Cited by 7 publications

(6 citation statements)

References 75 publications

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“…The small dependence on a cosmological model from SNe Ia data is not an issue for our method. SNe Ia can in principle be calibrated with H(z) from cosmic chronometers [38] or baryon acoustic oscillation [39].…”

Section: Discussionmentioning

confidence: 99%

Cosmological constraints on the gas depletion factor in galaxy clusters

Holanda

Busti

González

et al. 2017

J. Cosmol. Astropart. Phys.

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The evolution of the X-ray emitting gas mass fraction (fgas) in massive galaxy clusters can be used as an independent cosmological tool to probe the expansion history of the Universe. Its use, however, depends upon a crucial quantity, i.e., the depletion factor γ, which corresponds to the ratio by which fgas is depleted with respect to the universal baryonic mean. This quantity is not directly observed and hydrodynamical simulations performed in a specific cosmological model (e.g., a flat ΛCDM cosmology) have been used to calibrate it. In this work, we obtain for the first time self-consistent observational constraints on the gas depletion factor combining 40 X-ray emitting gas mass fraction measurements and luminosity distance measurements from type Ia supernovae. Using Gaussian Processes to reconstruct a possible redshift evolution of γ, we find no evidence for such evolution, which confirms the current results from hydrodynamical simulations. Moreover, our constraints on γ can be seen as a data prior for cosmological analyses on different cosmological models. The current measurements are systematic limited, so future improvements will depend heavily on a better mass calibration of galaxy clusters and their measured density profiles. 95.36.+x, 98.80.Es

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Section: Discussionmentioning

confidence: 99%

Cosmological constraints on the gas depletion factor in galaxy clusters

Holanda

Busti

González

et al. 2017

J. Cosmol. Astropart. Phys.

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“…The nature of these systematic effects does not have to be exotic physics to which CMB anisotropies are sensitive, but rather the result of unaccounted for yet mundane mechanisms independent of the CMB. As an example, in Evslin (2016) the validity of DD was used to test the calibration of the SNIa standard-candle relation. Hereafter, we will present results on cosmic distance systematics using the DD estimates in combination with a CMB-informed CP.…”

Section: Testing the Dd Relationmentioning

confidence: 99%

Statistical Test of Distance–Duality Relation with Type Ia Supernovae and Baryon Acoustic Oscillations

Corasaniti

2018

ApJ

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We test the distance-duality relation η ≡ d L /[(1 + z) 2 d A ] = 1 between cosmological luminosity distance (d L ) from the JLA SNe Ia compilation and angular-diameter distance (d A ) based on Baryon Oscillation Spectroscopic Survey (BOSS) and WiggleZ baryon acoustic oscillation measurements. The d L measurements are matched to d A redshift by a statistically consistent compression procedure. With Monte Carlo methods, nontrivial and correlated distributions of η can be explored in a straightforward manner without resorting to a particular evolution template η(z). Assuming independent constraints on cosmological parameters that are necessary to obtain d L and d A values, we find 9% constraints consistent with η = 1 from the analysis of SNIa + BOSS and an 18% bound results from SNIa + WiggleZ. These results are contrary to previous claims that η < 1 has been found close to or above the 1σ level. We discuss the effect of different cosmological parameter inputs and the use of the apparent deviation from distance-duality as a proxy of systematic effects on cosmic distance measurements. The results suggest possible systematic overestimation of SNIa luminosity distances compared with d A data when a Planck ΛCDM cosmological parameter inference is used to enhance the precision. If interpreted as an extinction correction due to a gray dust component, the effect is broadly consistent with independent observational constraints.

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“…In order to check their dependence on cosmological models, it is desirable to use them as free parameters. However, in recent works it has been observed that α and β act like global parameters for a dataset across different cosmological models [57][58][59][60]. As α and β have little effect on our analysis, we will simply adopt the best fit values from Ref.…”

Section: Datasetsmentioning

confidence: 99%

Probing the cosmic distance duality relation using time delay lenses

Rana

Jain

Mahajan

et al. 2017

J. Cosmol. Astropart. Phys.

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The construction of the cosmic distance-duality relation (CDDR) has been widely studied. However, its consistency with various new observables remains a topic of interest. We present a new way to constrain the CDDR η(z) using different dynamic and geometric properties of strong gravitational lenses (SGL) along with SNe Ia observations. We use a sample of 102 SGL with the measurement of corresponding velocity dispersion σ 0 and Einstein radius θ E . In addition, we also use a dataset of 12 two image lensing systems containing the measure of time delay ∆t between source images. Jointly these two datasets give us the angular diameter distance D A ol of the lens. Further, for luminosity distance, we use the 740 observations from JLA compilation of SNe Ia. To study the combined behavior of these datasets we use a model independent method, Gaussian Process (GP). We also check the efficiency of GP by applying it on simulated datasets, which are generated in a phenomenological way by using realistic cosmological error bars. Finally, we conclude that the combined bounds from the SGL and SNe Ia observation do not favor any deviation of CDDR and are in concordance with the standard value (η = 1) within 2σ confidence region, which further strengthens the theoretical acceptance of CDDR.

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Calibrating effective Ia supernova magnitudes using the distance duality relation

Cited by 7 publications

References 75 publications

Cosmological constraints on the gas depletion factor in galaxy clusters

Cosmological constraints on the gas depletion factor in galaxy clusters

Statistical Test of Distance–Duality Relation with Type Ia Supernovae and Baryon Acoustic Oscillations

Probing the cosmic distance duality relation using time delay lenses

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